Welcome to the Flat Glass Quality Association – a quality assurance association

Products displaying the RAL quality label meet the highest quality demands. It is the objective of the Flat Glass Quality Association (Gütegemeinschaft Flachglas, GGF) to warrant quality. The association was founded to assure and monitor the quality of multi-pane insulating glass. Every manufacturer of insulating glass wishing to display the quality label on its products must undertake to comply with the GGF's quality and testing standards.


The quality label is also an unmistakable, easy-to-recognise test marker that provides consumers with the safety required for their decision to purchase and prevents unpleasant surprises in the long-term.

Thus, the manufacturer is able to show the consumer, as simply as possible, that: "Our focus is quality".


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